Mid-styled by pollen of longest stamens of short-styled. Illegitimate union : 1 : 0 : 0.
Short-styled by pollen of shortest stamens of mid-styled. Legitimate union: 9 : 9 : 10.6.
Short-styled by pollen of shortest stamens of long-styled. Legitimate union: 2 : 2 : 9.5.
Short-styled by pollen of own mid-length stamens. Illegitimate union : 12 : 0 : 0.
Short-styled by pollen of own longest stamens. Illegitimate union : 9 : 0 : 0.
Short-styled by pollen of mid-length stamens of long-styled. Illegitimate union: 1 : 0 : 0.
The results are nearly the same as in the last case, but more striking; for 41 flowers belonging to the three forms fertilised legitimately all yielded capsules, containing on an average 10.31 seeds; whilst 39 flowers fertilised illegitimately did not yield a single capsule or seed. Therefore the fertility of the six legitimate to that of the several illegitimate unions, as judged both by the proportion of flowers which yielded capsules and by the average number of contained seeds, is as 100 to 0.
Oxalis speciosa.
This species, which bears pink flowers, was introduced from the Cape of Good Hope. A sketch of the reproductive organs of the three forms (Figure 4.11) has already been given. The stigma of the long-styled form (with the papillae on its surface included) is twice as large as that of the short-styled, and that of the mid-styled intermediate in size. The pollen-grains from the stamens in the three forms are in their longer diameters as follows:—
Table 4.c. Oxalis speciosa. Diameters of pollen-grains in divisions of the micrometer.